package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException_自定义异常;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.pojo.Category_分类;
import com.itheima.reggie.pojo.Dish_菜品;
import com.itheima.reggie.pojo.Setmeal_套餐;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category_分类>
        implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;

    /**
     * 根据id删除分类，删除之前需要进行判断
     *
     * @param id
     */
    @Override
    public void remove(Long id) {

        //添加查询条件，根据分类id进行查询菜品数据
        LambdaQueryWrapper<Dish_菜品> lqw = new LambdaQueryWrapper<>();
        lqw.eq(Dish_菜品::getCategoryId, id);
        int count1 = dishService.count(lqw);
        //如果已经关联，抛出一个业务异常
        if (count1 > 0) {
            throw new CustomException_自定义异常("当前分类下关联了菜品，不能删除");//已经关联菜品，抛出一个业务异常
        }

        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal_套餐> sLqw = Wrappers.<Setmeal_套餐>lambdaQuery();
        sLqw.eq(Setmeal_套餐::getCategoryId,id);
        int count2 = setmealService.count(sLqw);
        if (count2 > 0) {
            throw new CustomException_自定义异常("当前分类下关联了套餐，不能删除");//已经关联套餐，抛出一个业务异常
        }


        //正常删除分类
        super.removeById(id);
    }


}